Improvement in hoop-shavers



UNITED STATES PATENT OFFICE.,

JAMES DOUGLASS, OF CHEST SPRINGS, PENNSYLVANIA.

IMPROVEMENT IN HOOP-SHAVERS.

Specification forming part of Letters Patent No. 150,30, dated April 28, 1874; application filed v June 2c, 1873.

To all whom it may concern:

Be it known that I, JAMES DOUGLASS, of Chest Springs, in the county of Cambria and State of Pennsylvania, have invented a new and valuable Improvement in Hoop-Shavers; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of my improved hoop-shaver by a vertical central section. Figs. 2, 4, 5, and 6 are detailed views. Fig. 3 is a rear elevation of the same.

My invention relates to hoop-shaving machines; and it consists of the improved construction of a pair of exchangeable conical feed-rollers, their shafts, with end bearings in rocking blocks, and automatically adjustable sprin g-bearin gs, and two pairs of adjustable inclined shaving knives or blades, with slightlytapering guides so arranged that they work on the outside of the supporting-frame free of obstruction.

The object of my invention is to improve the parts of a hoop-shaving machine so that there can be more and better work done with less labor, and without danger of obstruction by the accumulation of chips.

In the drawings, A represents a foundationplate, with an upright tubular square casing fastened to it in any suitable manner, and composed of the open case B, and the cover b. To the opposite side of the plate A two standards, C, are fastened, each with two bearings, c, for the reception of the end journals d of two parallel horizontal bearings, D, through which the shafts E of the feed-rollers are passed. The shafts E are passed in front through block-bearings F, which are inserted into the case B, and may move up and down therein, for which purpose the cover b and the back of the case B are provided with vertical slots b', wherein the said shafts may have their play. rlhe shafts E are provided with facebearings e to prevent their slipping forward; the back-slip is preventedby the face-bearings of the rollers G, which are fastened to the shafts E by the keys g. The casingB is closed at the top and at the bottom by the lids H, which are fastened thereto, and which are provided with set-screws h. The bearings F are forced together by means of springs I, which may be of india-rubber, steel, or any other elastic substance. An india-rubber block below the lower bearing, and a steel spring above the upper bearing, have proved to be the most advantageous combination of springs for the operation of my machine, because the fiat side of the hoop is turned down when, it is introduced into the machine, and as the greatest irregularities are to be found on the halt'- roimd surface of the hoop, it is desirable Jthat the upper feed-roller should yield more readily to them than the lower roller. The rollers Gr are slightly conical, to prevent the hoops from running toward the outside, where the pressure is diminished in proportion to the distance from the horizontal fulcrums d. The surfaces of the said rollers may be nely or coarsely fiuted, or diagonally checkered, to suit the natural formation of the material, or the strength or stiffness of its fibrous construc tion. The regulation of the springs I is effected by the pressure-plates J, which are fitted into the casing B, and transfer the pressure of the set-screws l1l to the said springs equally. The shaving or trimming of the hoops is done by two pail-sof knives, each pair being inclined toward the feed -rollers. 'Ihe first pair of knives K gives the proper thickness to the hoops. Each knife K is fastened with a screw, k, to a wedge-shaped block, L, and is made adjustable by a slot, lc', through which the screw k is passed. Both of the said knives have the same inclination toward the line of direction in which the hoop passes between them. Their cutting-edges are parallel, and are so close to the feed-rollers that ,there is only room enough for the chips to pass above and below, thereby allowing no play to the passing hoop, and preventing it from being trimmed in an undulatory, instead of a plain, manner. v'Ihe blocks L arerigidly fastened to the casing B, and by standing apart allow the trimmed hoop to pass through between. At a small distance from the cutting-edges of the knives K, the trimmed hoop passes between the cuttingedges of two vertical knives, M M', which are fastened in a converging direction to the blocks L, and which trim the edges of the hoop and make them parallel. The knife M may be fastened and adjusted Vin the same manner as the knives K are. The knife M is passed through the flange b of the casing B7 and may be adjusted in the same manner that the plane-bits are fastened and adjusted to the planes. The cuttingfedge of the knife M must be kept in such position that its projection over the surface of the case B indicates the amount of trimming done to the right side of the hoop. The hoop is passed in between the feed-rollers close to the case B, which thereby forms the lateral guide for the operator. The lower and more steadily operated shaft E is provided with an operatingpulley, N, and communicates its motion to the upper shaft E by means of toothed gear-Wheels 21), having end journals d,f and journal-seats for the end journals of said shafts, and the vertically yielding` springbearings F, constructed and arranged substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two Witnesses,

JAMES DOUGLASS. Witnesses:

ANTHONY WILLs, C. H. PERRY. 

